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PPSC Physics Chapter 5 Waves and Wave Properties of Light MCQs With Answers
Question # 1
The quality of a note
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Decreases with loudness
Varies directly as its pitch
Varies inversely as its pitch
Depends upon the overtones
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Question # 2
In case of longitudinal waves the individual particles of the medium move.
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In circles
In ellipses
Parallel to wave propagation
Perpendicular to wave propagation
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Question # 3
Longitudinal waves cannot be
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Reflected
Difracted
Dispersed
Polarized
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Question # 4
The pitch of sound a determined by its
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Speed
Frequency
Direction
Number of beats
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Question # 5
The phase different between the particles vibrating's between two consecutive nodes is.
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0
Lamda /2
2
2 lamda
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Question # 6
In a diffraction pattern, the width of any fringe
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Is directly proportional to slit width
Is inversely proportional to slit with
Has no dependence on slit width
Is zero
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Question # 7
Interference fringe spacing depends on
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The wavelength of light used
The distance screen from the coherent sources
Separation between the sources
All of the above
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Question # 8
Which term best describes the nature of light from modern view point.
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Waves
Rays
Particles
Photons
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Question # 9
The fundamental frequency of a sound source is 256 Hz. What is the frequency of the first harmonic.
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64
128
256
512
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Question # 10
The loudness of a sound depend on its
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Frequency
Amplitude
Speed
Both a and b
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Question # 11
A wave reflected from the boundary of a denser medium will have phase change
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45
o
60
o
90
o
180
o
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Question # 12
The sound velocity in moist air as compared to dry air will be
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More
Less
Same
zero
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Question # 13
Wave length of a LASER can be sued as a standard of.
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Angle
Time
Length
Temperature
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Question # 14
Light of passing through a polaroid is
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Plane polarized
Unpolarized
Circularly polarized
Elliptically polarized
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Question # 15
Three tuning forks of frequencies 400 Hz. 401 Hz and 402 Hz are sounded together The frequency of beats per sound is.
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0
1
2
3
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Question # 16
The energy content of a wave is proportional to its.
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Wave velocity
Wave velocity squared
Frequency
Amplitude squared
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Question # 17
Beats occurs because of.
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Reflection
Refraction
Interference
Doppler's effect
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Question # 18
Which instrument measures properties of light over a specific portion of the electromagnetic spectrum.
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Photometer
Spectrometer
Hydrometer
Lactometer
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Question # 19
The same notes being played on sitar and veena differ in.
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Pitch
Quality
Both quality and pitch
Neither quality nor pitch
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Question # 20
Which of the following represents an elastic wave.
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Light waves
Radiowaves
X-rays
Sound waves
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Question # 21
The maximum displacement from the undisturbed position of the medium to the crest top is called.
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Wavelength
Amplitude
Period
Frequency
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